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Annotation of 43BSDReno/games/monop/roll.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)roll.c     5.5 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: /*
                     25:  *     This routine rolls ndie nside-sided dice.
                     26:  */
                     27: 
                     28: # define       reg     register
                     29: 
                     30: # if !defined(vax) && !defined(tahoe)
                     31: # define       MAXRAND 32767L
                     32: 
                     33: roll(ndie, nsides)
                     34: int    ndie, nsides; {
                     35: 
                     36:        reg long        tot;
                     37:        reg unsigned    n, r;
                     38: 
                     39:        tot = 0;
                     40:        n = ndie;
                     41:        while (n--)
                     42:                tot += rand();
                     43:        return (int) ((tot * (long) nsides) / ((long) MAXRAND + 1)) + ndie;
                     44: }
                     45: 
                     46: # else
                     47: 
                     48: roll(ndie, nsides)
                     49: reg int        ndie, nsides; {
                     50: 
                     51:        reg int         tot, r;
                     52:        reg double      num_sides;
                     53: 
                     54:        num_sides = nsides;
                     55:        tot = 0;
                     56:        while (ndie--)
                     57:                tot += (r = rand()) * (num_sides / 017777777777) + 1;
                     58:        return tot;
                     59: }
                     60: # endif

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